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B&K 1077B no video - problem solved
#10

I got back into it tonight. Problem found and resolved! Sometimes it helps to take a break and think things over. It wasn't what I originally thought, in fact, I wasted a LOT of time chasing - nothing. The culprit? Open electrolytic cap! Remember, I recapped it about 5 years ago? Well, one of the new caps was dead. I clipped a sub on and things came up, so I replaced and it came back to life. I wouldn't have dreamed that one of my new caps would have failed already - but it did! Soooo - learn from my pain, just because caps are new(er), doesn't mean they are good.

C62 was the main filter on the - supply.

   

The left black capacitor in the board with the tuners over it.
   

Soldered in a replacement and it came to life.
   

This cap is DEAD!

   

I still had a bag with some left - 10uf 450v. I believe came from AES. Has the big "U" on it. I tested a few others and they were marginal, not giving a good solid reading. Tossed them in the trash.
   

The schemo showing the horizontal driver using the ICs. This is kinda hard to find, so if you need a copy, PM me and I can send or post.
   

If I could find the place called "Somewhere", I could find "Anything" Icon_confused

Tim

Jesus cried out and said, "Whoever believes in me , believes not in me but in him who sent me" John 12:44


Messages In This Thread
B&K 1077B no video - problem solved - by TV MAN - 02-11-2025, 01:26 PM
RE: B&K 1077B no video - by TV MAN - 02-11-2025, 02:03 PM
RE: B&K 1077B no video - by radiorich - 02-11-2025, 09:01 PM
RE: B&K 1077B no video - by TV MAN - 02-11-2025, 09:11 PM
RE: B&K 1077B no video - by radiorich - 02-11-2025, 11:07 PM
RE: B&K 1077B no video - by TV MAN - 02-12-2025, 12:41 AM
RE: B&K 1077B no video - by radiorich - 02-12-2025, 01:55 AM
RE: B&K 1077B no video - by TV MAN - 02-13-2025, 04:04 PM
RE: B&K 1077B no video - by radiorich - 02-13-2025, 10:59 PM
RE: B&K 1077B no video - by TV MAN - Today, 12:40 AM



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